For this years Christmas Cards I printed using the polystyrene that you get at the bottom of shop brought pizza. I used a craft knife to cut out festive shapes, and using a pencil marked on indents (for the birds eye & tree decorations). I got to work printing using some acrylic paint, and then using pen added details.

Very interesting re-use of "garbage". I like your method. And a neat set of designs you chose. Simple, yet intricate all the same. Very festive. I can't pick a favorite. They are all lovely Happy Holidays to you, too.